[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/apitools/apitools/base/py/buffered_stream_test.py

Index: third_party/gsutil/third_party/apitools/apitools/base/py/buffered_stream_test.py
diff --git a/third_party/gsutil/third_party/apitools/apitools/base/py/buffered_stream_test.py b/third_party/gsutil/third_party/apitools/apitools/base/py/buffered_stream_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..4dcf62f9b04ea35d98f0b358686c5a7627199286
--- /dev/null
+++ b/third_party/gsutil/third_party/apitools/apitools/base/py/buffered_stream_test.py
@@ -0,0 +1,52 @@
+"""Tests for buffered_stream."""
+
+import string
+
+import six
+import unittest2
+
+from apitools.base.py import buffered_stream
+from apitools.base.py import exceptions
+
+
+class BufferedStreamTest(unittest2.TestCase):
+
+    def setUp(self):
+        self.stream = six.StringIO(string.ascii_letters)
+        self.value = self.stream.getvalue()
+        self.stream.seek(0)
+
+    def testEmptyBuffer(self):
+        bs = buffered_stream.BufferedStream(self.stream, 0, 0)
+        self.assertEqual('', bs.read(0))
+        self.assertEqual(0, bs.stream_end_position)
+
+    def testOffsetStream(self):
+        bs = buffered_stream.BufferedStream(self.stream, 50, 100)
+        self.assertEqual(len(self.value), len(bs))
+        self.assertEqual(self.value, bs.read(len(self.value)))
+        self.assertEqual(50 + len(self.value), bs.stream_end_position)
+
+    def testUnexhaustedStream(self):
+        bs = buffered_stream.BufferedStream(self.stream, 0, 50)
+        self.assertEqual(50, bs.stream_end_position)
+        self.assertEqual(False, bs.stream_exhausted)
+        self.assertEqual(self.value[0:50], bs.read(50))
+        self.assertEqual(False, bs.stream_exhausted)
+        self.assertEqual('', bs.read(0))
+        self.assertEqual('', bs.read(100))
+
+    def testExhaustedStream(self):
+        bs = buffered_stream.BufferedStream(self.stream, 0, 100)
+        self.assertEqual(len(self.value), bs.stream_end_position)
+        self.assertEqual(True, bs.stream_exhausted)
+        self.assertEqual(self.value, bs.read(100))
+        self.assertEqual('', bs.read(0))
+        self.assertEqual('', bs.read(100))
+
+    def testArbitraryLengthRead(self):
+        bs = buffered_stream.BufferedStream(self.stream, 0, 20)
+        with self.assertRaises(exceptions.NotYetImplementedError):
+            bs.read()
+        with self.assertRaises(exceptions.NotYetImplementedError):
+            bs.read(size=-1)